- Created ThirdPartyModule class in EnvelopeGenerator.Domain.Entities
- Mapped to TBDD_3RD_PARTY_MODULES table with appropriate columns
- Added properties: Id, Active, Name, Description, License, Version, AddedWho, AddedWhen, ChangedWho, ChangedWhen
- Configured data annotations for primary key, required fields, string lengths, and nullable support
- Conditional nullable support based on compilation symbols
